6 In Pivot Hinge for Hidden Bookcase Door, 50-60 kg (110-132 lbs) Load, Heavy Duty Hinges for Wooded Doors, 270 Degree Rotation, Stainless Steel Shaft Hinge Hardware (4 Pack) Specification: Material: stainless steel Weight capacity: 50-60 kg (110-132 lbs) Rotating degree: 270 degree Unite weight: 158 g (0.38 lb) Size: 150 x 29 x 4 mm (5.9 x 1.14 x 0.15 inch) Thickness: 4 mm (18 inch) Color: silver For detailed hole distance and other dimension, please look at the 2nd picture above. Screw material: stainless steel Screw size: M5mm Packing list: 4 x Pivot Hinges 16 x Screws Steps of Installation: 1. Drill holes in the corresponding positions of doors where was marked earlier; 2. Put the rotating shaft in the hole for assembling; 3. Put the door on the door frame, and then install the remaining screws after rotate the door.